Dietrich, Count of Oldenburg

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Dietrich of Oldenburg
Count of Oldenburg
Predecessor	Christian V of Oldenburg
Successor	Christian VII
Born	c. 1398
Died	14 February 1440 (aged 41–42) Delmenhorst,Germany
Buried	Roskilde Cathedral, Roskilde, Denmark
Noble family	House of Oldenburg
Spouse(s)	Countess Adelheid of Oldenburg-Delmenhorst Hedvig of Holstein
Issue	Christian I of Denmark Maurice V of Delmenhorst Gerhard VI, Count of Oldenburg Adelheid, Countess of Hohenstein and Mansfeld
Father	Christian V, Count of Oldenburg
Mother	Countess Agnes of Honstein

Dietrich or Theoderic of Oldenburg (c. 1398 – 14 February 1440) was a feudal lord in Northern Germany, holding the counties of Delmenhorst and Oldenburg. He was called "Fortunatus", as he was able to secure Delmenhorst for his branch of the Oldenburgs.

Dietrich was the father of Christian I of Denmark, who would go on to start the current dynasty of the Danish throne.